This paper proposes a novel maximum power point tracking (MPPT) algorithm that is combined with the advanced three-point weight comparison method (ATPWC) and MPPT limit detect (LD) mechanism and applied to a single stage standalone solar photovoltaic system. The boost converter is connected to the inverter and filter to deliver single-phase AC 110 VAC/60 Hz to the load. The MPPT LD detects when the system does not need MPPT based on the solar photovoltaic module's (SPV module) Rpv and load Ro. In addition, this study performs actual measurements for validation, in which the proposed algorithm is used in the built single-stage standalone solar photovoltaic system and compared with the ATPWC, three-point weight comparison method (TPWC), and conventional perturbation and observation (P&O) for MPPT efficiency. The result shows that the proposed algorithm is better than the other three algorithms. When the system is under a heavy load (Rpv > Ro), the overall system efficiency is 80%, while the efficiency under a non-heavy load (Rpv ≤ Ro) is 99%.
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